FREE BOOKS

Author's List




PREV.   NEXT  
|<   3   4   5   6   7   8   9   10   11   12   13   14   15   16   17   18   19   20   21   22   23   24   25   26   27  
28   29   30   31   32   33   34   35   36   37   38   39   40   41   42   43   44   45   46   47   48   49   50   51   52   >>   >|  
iminals for identification purposes. In such a small volume as this it would be impossible to deal with the working of wireless apparatus and the many systems that have been devised for the transmission of photographs over metallic circuits. The Author has taken it for granted that other works have been studied in connection with these subjects, and will therefore only describe such apparatus as is likely to be of use in wireless transmission. At present the transmission of photographs by wireless methods is in a purely experimental stage, and this book will have served its purpose if it helps to put future experimenters on the right track and prevent them from making expensive and fruitless experiments, by showing them the right direction in which investigations are being carried out. As there is no claim to originality in respect of a good many pieces of apparatus, etc., described, I have not thought it necessary to state the various sources from which the information has been obtained. M. J. M. ASHFORD, 1916. * * * * * {ix} CONTENTS PAGE PREFACE TO SECOND EDITION v PREFACE vii CHAPTER I INTRODUCTORY 1 Foreword--Early experiments--Advantages of Radio-Photography--Difficulties in Cable working--Bernochi's System--Knudsen's System. CHAPTER II TRANSMITTING APPARATUS 13 Wireless Apparatus--Preparing the Photographs--Transmitting Machines--Transmitting Apparatus--Effects of Arcing--Spark-Gaps--Contact Breakers--Complete Station--Professor Korn's Apparatus--Poulsen Company's Photographic Recorder--Comparison of various systems--Practical applications. CHAPTER III RECEIVING APPARATUS 37 Methods of Receiving--Author's Photographic Receiver--Decohering Apparatus--Description of Einthoven Galvanometer--Use of Galvanometer in Receiving--Belin's Application of Blondel's Oscillograph--Description of Charbonelle's Receiver--Use of Telephone Relay--Description of Telephone Relay--Telephotographic Receiver--Polarisation Receiver--Kathode-Ray Receiver--Electrolytic
PREV.   NEXT  
|<   3   4   5   6   7   8   9   10   11   12   13   14   15   16   17   18   19   20   21   22   23   24   25   26   27  
28   29   30   31   32   33   34   35   36   37   38   39   40   41   42   43   44   45   46   47   48   49   50   51   52   >>   >|  



Top keywords:
Receiver
 

Apparatus

 
CHAPTER
 

Description

 
wireless
 
apparatus
 
transmission
 

Author

 

Receiving

 

APPARATUS


System

 

experiments

 

Photographic

 

Transmitting

 

Galvanometer

 

PREFACE

 

working

 

photographs

 

Telephone

 

systems


Knudsen

 

Wireless

 

CONTENTS

 

TRANSMITTING

 
Photography
 
INTRODUCTORY
 

EDITION

 

SECOND

 

Foreword

 

Difficulties


Advantages

 
Bernochi
 
Recorder
 

Decohering

 

Einthoven

 

Methods

 

RECEIVING

 

Application

 

Blondel

 
Kathode

Electrolytic
 
Polarisation
 

Telephotographic

 

Oscillograph

 
Charbonelle
 

applications

 

Practical

 

Contact

 

Arcing

 
Effects